How to burn wax out of a lost wax casting mold

I did this at TechShop. http://www.techshop.com
Wax can be tough to get out of a mold for lost wax casting especially if you are doing it the cheep way without a vacuum dome. It is possible though.

Step 1: Prebake

The wax burns out at 1200 degrees. Heating a plaster mold to that temperature has to be done ever so gradually because it will shatter from heat shock. This is why we will prebake them raising the temperature slowly in a conventional oven untill it reaches 400 degrees.